Science Chemistry

Question 1

State how a positive ion is formed

Answer 1

Loss of an electron

Question 2

State how a negative ion is formed

Answer 2

Gain of an electron

Question 3

State what happens to electrons in ionic bonding

Answer 3

Electrons are transferred

Question 4

Covalent Bond

Answer 4

A pair of shared electrons

Question 5

State how many electrons are shared in one covalent bond

Answer 5

2

Question 6

State how many electrons are shared in a double covalent bond

Answer 6

4

Question 7

State how electrons are arranged in metallic structures

Answer 7

Ionic lattice

Question 8

Structure in metallic bonding

Answer 8

Lattice

Question 9

Two types of covalent structure

Answer 9

Simple molecular and giant

Question 10

Name two giant covalent structures

Answer 10

Diamond and Graphite

Question 11

Name 3 simple covalent structures

Answer 11

Water, Hydrogen, Oxygen

Question 12

State why most covalent structures can’t conduct electricity

Answer 12

No charged particles which can move

Question 13

Why metals can conduct electricity

Answer 13

Electrons are free to move and carry charge

Question 14

Recall when ionic substances can conduct electricity

Answer 14

When molten or in solution

Question 15

Recall why diamond has a boiling point

Answer 15

Many strong covalent bonds, requires lots of energy to overcome

Question 16

Why metals can be hammered into shape

Answer 16

Layers of ions can slide over each other

Question 17

State why simple molecules have a low boiling point

Answer 17

Intermolecular forces between molecules are weak and require little energy to overcome

Question 18

Two shapes that fullerenes form

Answer 18

Tubes, Spheres

Question 19

Recall the difference between graphite and graphene

Answer 19

Graphene = 1 layer
Graphite = many layers